North Bay Island is a popular destination in Port Blair. The beach and the snorkelling opportunities in its fringing coral reefs are the closest ones you will find at Port Blair. The corals at North Bay are rather good and spread over large areas. You shall spot many fishes, a lobster, or even clams on the coral reef. Life rings or jackets are provided during your snorkelling trip. A guide assists you while you snorkel. You do not require swimming skills to do this activity though swimming skills can help.
To reach North Bay, you'll have to take a ferry from the marine Jetty at the Aberdeen area. A tour guide will assist you every step of the way to make sure the experience is fluid and hassle-free. A usual snorkelling package already covers all the ticketing and transportation charges. Snorkelling equipment and other necessities are provided by the vendor, so all you have to do is dive and explore. Alternatively, you can book the ferry on your own and make a trip to the island with your own equipment and snorkel there for long hours.